/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (c) 2012 by Amaury Pouly * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include /* off_t */ #include #include "cpu.h" #include "system.h" #include "backlight-target.h" #include "lcd.h" #include "lcdif-imx233.h" #include "clkctrl-imx233.h" #include "pinctrl-imx233.h" #include "logf.h" #ifdef HAVE_LCD_ENABLE static bool lcd_on; #endif static void lcd_write_reg(uint16_t reg, uint16_t data) { imx233_lcdif_pio_send(false, 1, ®); if(reg != 0x22) imx233_lcdif_pio_send(true, 1, &data); } static void lcd_init_seq(void) { lcd_write_reg(1, 0x11c); lcd_write_reg(2, 0x100); lcd_write_reg(3, 0x1030); lcd_write_reg(8, 0x808); lcd_write_reg(0xc, 0); lcd_write_reg(0xf, 0xc01); lcd_write_reg(0x20, 0); lcd_write_reg(0x21, 0); udelay(30); lcd_write_reg(0x10, 0xa00); lcd_write_reg(0x11, 0x1038); udelay(30); lcd_write_reg(0x12, 0x1010); lcd_write_reg(0x13, 0x50); lcd_write_reg(0x14, 0x4f58); lcd_write_reg(0x30, 0); lcd_write_reg(0x31, 0xdb); lcd_write_reg(0x32, 0); lcd_write_reg(0x33, 0); lcd_write_reg(0x34, 0xdb); lcd_write_reg(0x35, 0); lcd_write_reg(0x36, 0xaf); lcd_write_reg(0x37, 0); lcd_write_reg(0x38, 0xdb); lcd_write_reg(0x39, 0); lcd_write_reg(0x50, 0); lcd_write_reg(0x51, 0x705); lcd_write_reg(0x52, 0xe0a); lcd_write_reg(0x53, 0x300); lcd_write_reg(0x54, 0xa0e); lcd_write_reg(0x55, 0x507); lcd_write_reg(0x56, 0); lcd_write_reg(0x57, 3); lcd_write_reg(0x58, 0x90a); lcd_write_reg(0x59, 0xa09); udelay(30); lcd_write_reg(7, 0x1017); udelay(40); } void lcd_init_device(void) { /* the LCD seems to work at 24Mhz, so use the xtal clock with no divider */ imx233_clkctrl_enable(CLK_PIX, false); imx233_clkctrl_set_div(CLK_PIX, 1); imx233_clkctrl_set_bypass(CLK_PIX, true); /* use XTAL */ imx233_clkctrl_enable(CLK_PIX, true); imx233_lcdif_init(); imx233_lcdif_set_lcd_databus_width(16); imx233_lcdif_set_word_length(16); imx233_lcdif_set_timings(2, 2, 3, 3); imx233_lcdif_enable_underflow_recover(true); imx233_lcdif_setup_system_pins(16); // reset device imx233_lcdif_reset_lcd(true); mdelay(50); imx233_lcdif_reset_lcd(false); mdelay(10); imx233_lcdif_reset_lcd(true); lcd_init_seq(); #ifdef HAVE_LCD_ENABLE lcd_on = true; #endif } #ifdef HAVE_LCD_ENABLE bool lcd_active(void) { return lcd_on; } static void lcd_enable_seq(bool enable) { if(!enable) { } else { } } void lcd_enable(bool enable) { if(lcd_on == enable) return; lcd_on = enable; if(enable) imx233_lcdif_enable(true); lcd_enable_seq(enable); if(!enable) imx233_lcdif_enable(false); else send_event(LCD_EVENT_ACTIVATION, NULL); } #endif void lcd_update(void) { lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT); } void lcd_update_rect(int x, int y, int w, int h) { #ifdef HAVE_LCD_ENABLE if(!lcd_on) return; #endif /* make sure the rectangle is included in the screen */ x = MIN(x, LCD_WIDTH); y = MIN(y, LCD_HEIGHT); w = MIN(w, LCD_WIDTH - x); h = MIN(h, LCD_HEIGHT - y); imx233_lcdif_wait_ready(); lcd_write_reg(0x37, x); lcd_write_reg(0x36, x + w - 1); lcd_write_reg(0x39, y); lcd_write_reg(0x38, y + h - 1); lcd_write_reg(0x20, x); lcd_write_reg(0x21, y); lcd_write_reg(0x22, 0); imx233_lcdif_wait_ready(); imx233_lcdif_set_word_length(16); imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */ /* there are two cases here: * - either width = LCD_WIDTH and we can directly memcopy a part of lcd_framebuffer to FRAME * and send it * - either width != LCD_WIDTH and we have to build a contiguous copy of the rectangular area * into FRAME before sending it (which is slower and doesn't use the hardware) * In all cases, FRAME just acts as a temporary buffer. * NOTE It's more interesting to do a copy to FRAME in all cases since in system mode * the clock runs at 24MHz which provides barely 10MB/s bandwidth compared to >100MB/s * for memcopy operations */ if(w == LCD_WIDTH) { memcpy((void *)FRAME, FBADDR(x,y), w * h * sizeof(fb_data)); } else { for(int i = 0; i < h; i++) memcpy((fb_data *)FRAME + i * w, FBADDR(x,y + i), w * sizeof(fb_data)); } /* WARNING The LCDIF has a limitation on the vertical count ! In 16-bit packed mode * (which we used, ie 16-bit per pixel, 2 pixels per 32-bit words), the v_count * field must be a multiple of 2. Furthermore, it seems the lcd controller doesn't * really like when both w and h are even, probably because the writes to the GRAM * are done on several words and the controller requires dummy writes. * The workaround is to always make sure that we send a number of pixels which is * a multiple of 4 so that both the lcdif and the controller are happy. If any * of w or h is odd, we will send a copy of the first pixels as dummy writes. We will * send at most 3 bytes. We then send (w * h + 3) / 4 x 4 bytes. */ if(w % 2 == 1 || h % 2 == 1) { /* copy three pixel after the last one */ for(int i = 0; i < 3; i++) *((fb_data *)FRAME + w * h + i) = *((fb_data *)FRAME + i); /* WARNING we need to update w and h to reflect the pixel count BUT it * has no relation to w * h (it can even be 2 * prime). Hopefully, w <= 240 and * h <= 320 so w * h <= 76800 and (w * h + 3) / 4 <= 38400 which fits into * a 16-bit integer (horizontal count). */ h = (w * h + 3) / 4; w = 4; } imx233_lcdif_dma_send((void *)FRAME_PHYS_ADDR, w, h); }